Microscopic dynamic simulation model for pedestrian at signalized intersection

Abstract

Pedestrian’s road-crossing model is the key part of micro-simulation for mixed traffic at signalized intersection. To reproduce the crossing behavior of pedestrians, the microscopic behaviors of the pedestrians passing through the crosswalk at signalized intersection were analyzed. A pedestrian’s decision making model based on gap acceptance theory was proposed. Based on the field data at three typical intersections in Beijing, China, the critical gaps and lags of pedestrians were calibrated. In addition, considering pedestrian’s required space, a modification of the social force model that consists of a self-deceleration mechanism prevents a simulated pedestrian from continuously pushing over other pedestrians, making the simulation more realistic. After the simple change, the modified social force model is able to reproduce the fundamental diagram of pedestrian flows for densities less than 3.5 m⁻² as reported in the literature.

Keywords

communication and transportation system / pedestrian simulation / social force model / decision making model / fundamental diagram / mixed traffic

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